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toastyghost View Drop Down
The 10,000 Points Club
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Joined: 09 January 2007
Location: Manchester
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Points: 10919 		Post Options Post Options   Thanks (0) Thanks(0)   Quote toastyghost Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2018 at 11:22am
Originally posted by Meat Meat wrote:

Never. I have never seen anything like that before. I've seen a few systems that were very loud outside but nothing like that.


I've been to Brazil TWICE in four months and I still didn't get to bloody experience one of these daft trucks. Next time, 100% happening.
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mobiele eenheid View Drop Down
Old Croc
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Joined: 15 August 2004
Location: Netherlands
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Points: 1568 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mobiele eenheid Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2018 at 1:55pm
Quote an excellent anchor for a small boat
Look honey, an 8 Ohm driver with a BL of over 45, let’s use it as a boat anchor

Quote I don't understand like Kxm ... is that LE?
No, it’s more like Le = Kxm x frequency^(Exm – 1), although most examples I’ve seen turn out a bit lower then that, still probably at least 6mH for this driver.

Quote Whats the Voice coil diameter? Xmax? Magnet gap depth? VC winding height?
Those are the million dollar questions, looking at the Qes and BL, at least one of those is BIG.

Quote Previous shipments from this supplier to here in New Zealand have run to about US$400 for 12 drivers
So 400 / 12 = US$33.3 per driver?

Like gen0me asked (see previous quote), you really would like to know the VC, Xmax, Hg and Hvc first. But everything up to know indicates lot’s of sub not so much kick.

Best regards Johan



Edited by mobiele eenheid - 01 June 2018 at 1:56pm
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Hemisphere View Drop Down
Old Croc
Old Croc


Joined: 21 April 2008
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Points: 2272 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hemisphere Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2018 at 2:06pm
The 91.5dB efficiency spike at 25Hz would make it perfect for theatre/installation sound effects in reflex boxes. (Earthquake/thunder etc).

Varies wildly in efficiency down low though.
Phase 1: Post on Speakerplans
Phase 2: ?????
Phase 3: Profit!
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bob4 View Drop Down
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Joined: 29 February 2004
Location: Finland/Germany
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Points: 1843 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bob4 Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2018 at 2:54pm
Originally posted by gen0me gen0me wrote:

[/IMG]


They should try to play "judgement dub" on that
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partya View Drop Down
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Joined: 06 September 2013
Location: New Zealand
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Points: 105 		Post Options Post Options   Thanks (0) Thanks(0)   Quote partya Quote  Post ReplyReply Direct Link To This Post Posted: 02 June 2018 at 12:04pm
The voice coil is 6 inches / 154.2mm and the xmax is 16.5mm.

I am going to ask what their MOQ is, I need a new project!

Cheers
Turn it up! Turn what up?
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citizensc View Drop Down
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Joined: 16 October 2015
Location: Perth,Australia
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Points: 532 		Post Options Post Options   Thanks (0) Thanks(0)   Quote citizensc Quote  Post ReplyReply Direct Link To This Post Posted: 03 June 2018 at 9:35am
Originally posted by mobiele eenheid mobiele eenheid wrote:

Quote I don't understand like Kxm ... is that LE?
No, it’s more like Le = Kxm x frequency^(Exm – 1), although most examples I’ve seen turn out a bit lower then that, still probably at least 6mH for this driver.

Okay with an LE of 6 the sim is even better... 

Inputs:


Grey is this driver, black is 21sw152-4


This works out to about 2500 watts at 8 ohm, someone correct me if i'm wrong. 

displacement at that power: 


If you do end up using these drivers in a build, id love to see a thread showing your progress and results. To my eyes it looks suitable in an othorn if you're not sure what to do with it. 
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partya View Drop Down
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Joined: 06 September 2013
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Points: 105 		Post Options Post Options   Thanks (0) Thanks(0)   Quote partya Quote  Post ReplyReply Direct Link To This Post Posted: 05 June 2018 at 2:55am
Thanks a lot for all of the sims and advice. I'll be sure to post any builds I get underway, will probably be a few months down the track though! 

Cheers
Turn it up! Turn what up?
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